This species is known only from the Isthmus of Kra in southern Thailand (Matsui et al., 2005). There are records from: Punyaban waterfall, Raksawarn Public Park, Ranong Spa, in Ranong Province; Klong Hat Som Pen, Muang, in Ranong Province; and Kao Lak, in Phang Nga Province (Matsui et al., 2005). In addition, specimens from Tasan, in southern Thailand, formerly considered to belong to Ansonia malayana, are now considered to belong to A. kraensis (Grismer, 2006). It is possible that other records of A. malayanus from southern Thailand might refer to this species. The type locality (Punyaban waterfall) is at 113m asl, but no information has been provided on its elevation range.
Habitat and Ecology
It lives in forest and has been found at night along the bank of a mountain stream perching on leaves of short grasses (Matsui et al., 2005). They have also been found near a seepage over 30m from a stream (Matsui et al., 2005). It breeds by larval development in streams (Matsui et al., 2005).
No information is currently available on its abundance.
No direct information on threats is yet available, although it is likely to be affected by forest loss for logging and agricultural expansion.
It is known from the Raksawarn Public Park. Surveys are needed to determine its geographic range, abundance, ecological requirements, threats and conservation needs.
Simon Stuart 2008. Ansonia kraensis. In: IUCN 2014